Alternative Equation Formats

$$\begin{array}{rcl}\mathsf{a}\mathsf{g}\mathsf{e}\mathsf{g}\mathsf{r}\mathsf{o}\mathsf{u}\mathsf{p}& =& \{\begin{array}{clccccc}1& \text{if}& & & \text{age}& \le <!--\; \le \; --><span\; class="Comment\_comment\_\_N0+Yl"></span>& 25\\ 2& \text{if}& 25& <& \text{age}& \le <!--\; \le \; --><span\; class="Comment\_comment\_\_N0+Yl"></span>& 40\\ 3& \text{if}& 40& <& \text{age}& \le <!--\; \le \; --><span\; class="Comment\_comment\_\_N0+Yl"></span>& 55\\ 4& \text{if}& 55& <& \text{age}& \le <!--\; \le \; --><span\; class="Comment\_comment\_\_N0+Yl"></span>& 70\\ 5& \text{if}& 70& <& \text{age}& & \end{array}\end{array}$$

$$\begin{array}{rcl}\mathsf{a}\mathsf{g}\mathsf{e}\mathsf{g}\mathsf{r}\mathsf{o}\mathsf{u}\mathsf{p}& =& \{\begin{array}{clccccc}1& \text{if}& & & \text{age}& \le <!--\; \le \; --><span\; class="Comment\_comment\_\_N0+Yl"></span>& 25\\ 2& \text{if}& 25& <& \text{age}& \le <!--\; \le \; --><span\; class="Comment\_comment\_\_N0+Yl"></span>& 40\\ 3& \text{if}& 40& <& \text{age}& \le <!--\; \le \; --><span\; class="Comment\_comment\_\_N0+Yl"></span>& 55\\ 4& \text{if}& 55& <& \text{age}& \le <!--\; \le \; --><span\; class="Comment\_comment\_\_N0+Yl"></span>& 70\\ 5& \text{if}& 70& <& \text{age}& & \end{array}\end{array}$$

\begin{eqnarray*} \Variable{agegroup} & = & \left\{ \begin{array}{clcccccc} 1 & \textrm{if} & & & \textrm{age} & \leq & 25 \\ 2 & \textrm{if} & 25 & < & \textrm{age} & \leq & 40 \\ 3 & \textrm{if} & 40 & < & \textrm{age} & \leq & 55 \\ 4 & \textrm{if} & 55 & < & \textrm{age} & \leq & 70 \\ 5 & \textrm{if} & 70 & < & \textrm{age} & & \end{array}\right. \end{eqnarray*}